travis: Add some test dependencies
travis: Add some test dependencies

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

dvbportal/osx-lxd,ollie314/lxd,rcj4747/lxd,ollie314/lxd,erikmack/lxd,stgraber/lxd,mjeanson/lxd,chrisglass/lxd,hallyn/lxd,stgraber/lxd,rrva/lxd,dvbportal/osx-lxd,ericsnowcurrently/lxd,jensg-st/lxd,atxwebs/lxd,pcdummy/lxd,mikemccracken/lxd,jumpstarter-io/lxd,yura-pakhuchiy/lxd,georghopp/lxd,akshaykarle/lxd,jumpstarter-io/lxd,jensg-st/lxd,yura-pakhuchiy/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,georghopp/lxd,chrisglass/lxd,Skarlso/lxd,smoser/lxd,dustinkirkland/lxd,achanda/lxd,Malizor/lxd,akshaykarle/lxd,techtonik/lxd,hallyn/lxd,smoser/lxd,tych0/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,ericsnowcurrently/lxd,atxwebs/lxd,chrisglass/lxd,jsavikko/lxd,beni55/lxd,rrva/lxd,benaryorg/lxd,mikemccracken/lxd,stgraber/lxd,hallyn/lxd,sl1pm4t/lxd,ericsnowcurrently/lxd,Skarlso/lxd,benaryorg/lxd,achanda/lxd,lxc/lxd,techtonik/lxd,atxwebs/lxd,techtonik/lxd,Skarlso/lxd,benaryorg/lxd,mjeanson/lxd,basvanbeek/lxd,dustinkirkland/lxd,hallyn/lxd,beni55/lxd,erikmack/lxd,akshaykarle/lxd,stgraber/lxd,tych0/lxd,rcj4747/lxd,dvbportal/osx-lxd,jsavikko/lxd,basvanbeek/lxd,basvanbeek/lxd,erikmack/lxd,mjeanson/lxd,tych0/lxd,georghopp/lxd,smoser/lxd,yura-pakhuchiy/lxd,beni55/lxd,achanda/lxd,rrva/lxd,pcdummy/lxd,lxc/lxd,dustinkirkland/lxd,sl1pm4t/lxd,Malizor/lxd,sl1pm4t/lxd,ollie314/lxd,hallyn/lxd,pcdummy/lxd,jensg-st/lxd,Malizor/lxd,jumpstarter-io/lxd,jsavikko/lxd,Skarlso/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,rcj4747/lxd,hallyn/lxd,mikemccracken/lxd